Is Bridgelux V22 the forgotton GEM
- Thread starter welight
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welight
Well-Known Member
does not change the story greatly, LUMINOUS Calc does not let you set current, so 57 watts is close as I could get it, much better efficiency at significant price discount
CobKits
Well-Known Member
its not a bad chip. does well at higher current but to me the low current performance was underwhelming. not sure what to make of that (chip has above average thermal properties but simply needs more dies?). these were tested on different days so the vero and cxb "B" were at a very slight disadvantage. you can quantify the extent of "disadvantage by comparing cxb3590 "A" to "B" (same chip, "A" was tested on same day as CXM22, "B" was tested on same day as vero)
CobKits
Well-Known Member
couple ways to look at that data
first off welight has the CXMs listed at $19, they are $17 in small qtys after RIU code, and there are also decent volume discounts on those. b-lux pricing is pretty tight so im not sure if volume discounts are an option. if youre in the USA, probably best to call the V22 $13.50 (digikey, or alternatively welight's $12.95 shipped internationally) vs the luminus at $17. if i was selling luminus in qty they'd be in the 15s but thats neither here nor there.
so thats 26% more cost per chip.
if youre looking at the ~$35 cost of heatsink/holder/chip assembly, its more like 10% more per unit. so what does that get you? for chips driven at same wattage thats 3% more light.... up to 6 crops a year
alternatively assuming your heatsinks are appropriately sized to handle a bit more juice, and you have an efficacy target. you can get 25% watts (and thus 25% more light) out of a CXM22 at the same efficacy level:
so you could reduce your number of fixtures (chip/heatsink/holder) by up to 25% and have same amount of light at same efficacy, far exceeding the 10% savings of the cheaper chip. even if you had to select a bigger heatsink (debatable when considering 45 vs 55 cob watts aka 22-27 heat watts) youd still save a bit.
CXM22 isnt a magic bullet but it is really affordable and most importantly punches way above its weight in the important 40-70W range we like. i had high hopes when i tested that V22 because the V29s are really great, but it left me wanting at low currents. that was in spring or early summer, maybe the v22s have improved since them luminus are saying gen4 in Q1 2018 so i for one am excited to see if they can improve it even further
first off welight has the CXMs listed at $19, they are $17 in small qtys after RIU code, and there are also decent volume discounts on those. b-lux pricing is pretty tight so im not sure if volume discounts are an option. if youre in the USA, probably best to call the V22 $13.50 (digikey, or alternatively welight's $12.95 shipped internationally) vs the luminus at $17. if i was selling luminus in qty they'd be in the 15s but thats neither here nor there.
so thats 26% more cost per chip.
if youre looking at the ~$35 cost of heatsink/holder/chip assembly, its more like 10% more per unit. so what does that get you? for chips driven at same wattage thats 3% more light.... up to 6 crops a year
alternatively assuming your heatsinks are appropriately sized to handle a bit more juice, and you have an efficacy target. you can get 25% watts (and thus 25% more light) out of a CXM22 at the same efficacy level:
so you could reduce your number of fixtures (chip/heatsink/holder) by up to 25% and have same amount of light at same efficacy, far exceeding the 10% savings of the cheaper chip. even if you had to select a bigger heatsink (debatable when considering 45 vs 55 cob watts aka 22-27 heat watts) youd still save a bit.
CXM22 isnt a magic bullet but it is really affordable and most importantly punches way above its weight in the important 40-70W range we like. i had high hopes when i tested that V22 because the V29s are really great, but it left me wanting at low currents. that was in spring or early summer, maybe the v22s have improved since them luminus are saying gen4 in Q1 2018 so i for one am excited to see if they can improve it even further
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